Torque producing device
US7476999B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2003 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Apr 28, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F17/0006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Device (100) for producing torque, the device including an armature (102) made of a printed circuit board, at least one winding (124) formed on the armature in a substantially rectangular spiral path, at least one magnetic field inducer (108) and a counteractive-torque producing element (116) coupled with the armature, the armature being rotatable about a rotation axis, each of the magnetic field inducers being located in the vicinity of a respective corner of the substantially rectangular spiral path, each of the magnetic field inducers producing a magnetic field along a magnetic axis in a selected direction, the selected direction being opposite to another selected direction respective of an adjacent magnetic field inducer, each of the magnetic axes being substantially normal to the substantially rectangular spiral path, the windings and the magnetic field inducers applying the torque on the armature, when electric power is applied to the windings, the torque being at a torque level respective of a selected power level, the counteractive-torque producing element applying a counteractive torque on the armature in a direction opposite to that of the torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.